On the hit Netflix series Orange is the New Black, the character Taystee is often bubbling over with attitude — and in real life, actress Danielle Brooks has plenty of confidence of her own.

Like most people, though, Danielle sometimes sees her confidence falter — as it did this weekend while she was working out at the gym, sweating it out in just a sports bra. When the 27-year-old noticed a slimmer woman also exercising in a sports bra, she started rethinking her wardrobe choice.

Her moment of self-doubt didn't last long, however, and she soon took to Instagram to remind fans not to compare themselves to other, but to worry only about being the best version of themselves.

Speaking out: Danielle Brooks shared a video on Instagram on Sunday in which she talked about body confidence

The 27-year-old said she'd been working out in a sports bra, feeling great, when a thinner woman came in dressed the same way, which suddenly made her doubt herself

'Hey y'all,' she says in the clip, which she uploaded on Sunday. 'So I just left the gym, and as most people now, I take my shirt off when I go to the gym. like, that's my new thing, it gives me confidence, whatever.'

And she can still be seen in that workout gear, wearing a black and purple sports bra and a cute leather baseball cap on her head.

'So I have my shirt off, and this lady walks in,' she goes on. 'I ain't gonna like, she looked good with her shirt off. So immediately, I'm like, "oh no".

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Feeling good: Though she felt her confidence dip, she quickly gave herself a pep talk and snapped out of it

Fan favorite: Danielle (left) plays Taystee on Netflix's Orange is the New Black

Danielle didn't put her shirt back on, though — and she's not changing up her gym style, either. Soon, she had an epiphany that helped her back to her more self-assured way of thinking.

'I realized,' she explained, 'I'm comparing myself to this woman, and I'm like, why? Just two minutes ago I was feeling great, and now I'm not.

'And I realized the reason I was feeling so great is because I was comparing myself to yesterday's Danielle. And today's Danielle is better than yesterday's. And that's why I felt so good.'

She signed off with this message: 'Ladies, I'm just saying, don't compare yourself to nobody. Just be a better you!'

Self-improvement: Danielle said she realized she shouldn't compare herself to others, but just to herself — and she was a better Danielle today than she was yesterday

Her confidence-boosting message clearly resonated with her followers, who have watched the video over 117,000 times so far and left supportive comments.

'YAAAAASSSSSSSS, QUEEN!!!!!! Thank you so much for sharing this!!!!! Your curves are gorgeous!!!' wrote one.

Several told her that her words were exactly what they needed to hear, while one added: 'For sure feeling you on this. I worked out four days between Monday and Monday this past week. I feel great. That's all that should matter.'

Thanks, girl! Her message to 'be a better you' resonated with fans, who applauded her

Danielle has spoken out about body confidence in the past, as well as the need to support plus-size women.

In October, she joined Refinery29 for its 67% Project, representing the 'invisible majority' of plus-size women in the US. The site pledged that from then on, 67 per cent of the bodies it pictured would be plus-size.

'There is value in the plus-size dollar. In 2014, the plus-size apparel market generated over $17.5 billion. Both the fashion and media industries are missing out, big time,' she wrote in an essay for the site.

'Editors, we want to be seen. Designers, we want to be dressed. Retailers, we want options. Women, we must do this together,' she concluded.